Hi,
In Chemistry we needed to make our final blog post this term and write about the things that we have learned.
Contraction - ( Imploding Can )
What happened to the imploding can was when we heated the can and boiled the water inside the can. Is that the heat diffused through out the can and each particles of the can vibrated that's what made the can spreaded its heat. Then the particles of the can also made the warm water vibrated that us way it boiled.
Then we grabbed an ice cream container and put cold water in the container. Then we grabbed the can with boiling water inside and tipped the can over to the cold water inside the container, and the hot and cold water contracted to each other then the can imploded.
The contraction means is a process of getting smaller, tighter and shorter.
Expansion - ( Ball and Hop )
What we did in Ball and Hoop experiment is that we grabbed the hoot and the ball then we tried to put the ball through the hoot and it fitted through the hoop. When we heated the ball for 30 seconds and tried again if the ball still fits through the hoop and the ball didn't fit through.
How did the ball fit through the hoop at the first time and after heating it up it didn't fit it is because the tiny particles of the ball expanded while it was heating up that is why it didn't fit through the hoop again. How did we made it fit again? We put the hot ball on a cold running water and it got back to normal and it fitted through the hoop and again.
Expansion means the action of becoming larger or more extensive.
Conduction ( Dropping pin )
What happened to the Dropping pin was when we heated the metal rod it conduct/ the heat travelled quickly, and the vibration of the heat travelled through out the metal rod and heat the Vaseline and the pins so the pins dropped on the table. What happened was when we heated the metal rod it conduct/ the heat travelled quickly, and the vibration of the heat travelled through out the metal rod and heat the Vaseline and the pins so the pins dropped on the table.
Conduction means the process by which sound waves travel through.
Convection in liquid ( permanganate crystal in water )
What we did to this experiment is that we heated one side of the can and put the straw from the opposite side of the fire. Then we dropped the tiny crystal through the straw's hole and let it slide to get to the water, what happened was the crystal diffused throughout the water.
Convection means is the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.
Convection in Gas ( Tea Bag Rockets )
What we did in Tea Bag Rocket experiment is we cutted the top bit of the tea bag and pour the tea leaves out, then we spreaded out the tea bag and cut the top part again but this time we have to make the top part is equally aligned. After that we turned the tea bag around and put the top bit to the bottom to make it stand up, then we lighted the tea bag and it flew up wards.
Convection means is the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.
